[chemboy]

Compound X has an R(f) of 0.22 with hexane as the eluent. Using ethyl acetate as the eluent, would the R(f) of Compound X be expected to be greater than, less than, or equal to 0.22? Why?

Why are solvents in a gradient system increasingly polar? What would happen if you tried to do the reverse?

[wgmwwggmmwgm]

i think it should be practised before i draw a conclusion.